Pro Circuit Hard Parts

Pro Circuit - Exhaust Plug:
An essential item when washing your dirt bike, the Pro Circuit Exhaust Plug helps to prevent water and mud from leaking into your exhaust system. Water getting inside your exhaust system and onto your packing could cause damage to the entire system. Not only great...

Pro Circuit - Aluminum Throttle Tubes
• CNC-machined aluminum and Teflon coated. Stronger and more durable than the OEM plastic units.  

Pro Circuit - Clutch Springs
• 12-15% stiffer than stock
• More positive clutch engagement
• Prevent clutch slipping
• Consistent spring performance
• Control how efficiently your clutch turns power into acceleration
• Sold as a set

Kawasaki Forged Levers
• Pro Circuit Brake levers are made by Sunline and forged from 6061 T-6 aluminum for strength and durability
• They are designed to fit the stock perch and exceed OEM specifications
• Black finish

Pro Circuit - Billet Axle Blocks:
• CNC machined from billet aluminum for strength and light weight
• Aid in rear wheel alignment, which improves high speed stability and extends chain and sprocket life
• Honda blocks are anodized red, all other applications are anodized brown

Pro Circuit - Clutch Covers
• Developed using the latest design, testing and manufacturing technologies to improve dependability, strength and heat dissipation.
• Precision machined from billet T-6 aircraft-quality aluminum to aerospace tolerances.

Honda Forged Levers
• Pro Circuit Brake levers are made by Sunline and forged from 6061 T-6 aluminum for strength and durability
• They are designed to fit the stock perch and exceed OEM specifications
• Black finish

Pro Circuit - Thermostrips
• Thermostrips allow you to monitor the running temperature of your motor, shock or radiators to make sure you're not losing power due to overheating. 
• Three thermostrips per pack

Suzuki Forged Levers
• Pro Circuit Brake levers are made by Sunline and forged from 6061 T-6 aluminum for strength and durability
• They are designed to fit the stock perch and exceed OEM specifications
• Black finish

Yamaha Forged Clutch Levers
• Pro Circuit Clutch levers are made by Sunline and forged from 6061 T-6 aluminum for strength and durability
• They are designed to fit the stock perch and exceed OEM specifications
• Black finish

Pro Circuit Triple Clamps:
*The 2019 Pro Circuit Triple Clamps were changed from a 22mm offset to a 23mm offset for the KX250F (2013-2019 models), the KX450F (2013-2018 models), & the 2019 KX450. This change in offset for the 2019 Triple Clamps was made specifically to increase the stability of...

Pro Circuit - Fuel Mixture Screw
• The under-the-float-bowl location of the fuel screw makes it next to impossible to reach.
• Pro Circuits fuel mixture screw can be turned by hand.
• Fits Keihin accelerator-pump carburetors (FCR)

Pro Circuit - Heat Shields
• Because four-stroke engines produce so much heat, the gasoline in the tank can lose it's combustibility. 
• In some cases, the gas reaches the boiling point inside the float bowl.

Pro Circuit Pull Rods (Honda) :
• Length: 146mm (stock 144.5mm)
 

Pro Circuit - i Boost 2 Throttle Body Kit
Included in the kit: Throttle Body Insert (TRIGA-TBI)
• Improves the volumetric efficiency of the engine by applied Pressure Wave Tuning (PWT).
• Up and down running pressure wave in the intake system is tuned to ensure the positive peak of...

Pro Circuit – Engine Performance Package (Honda):
Pro Circuit has been building motors and engines since 1978, and they haven't let their loyal fanbase down yet. Pro Circuit has spent years trying to build their reputation as a renowned engine builder through dedication and good old fashioned hard work, and...